Joint for pipe-couplings.



No. 720,655. JPATENTED PEB. 1'7, 1903.

G. F. BARD. JOINT FOR PIPE COUPLINGS.

APPLICATION FILED MAR. 3, 1902.

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UNITED STATES PATENT OFFICE.

GEORGE F. BARD, OF NORWICH, CONNECTICUT.

JOINT FOR PIPE-COUPLINGS.

SPECIFICATION forming partof Letters Patent No. 720,655, dated February17, 1903. Application filed March 3, 1902. Serial No; 96,365. (Nomodel.)

To all whom it may concern.-

Be it known that I, GEORGE F. BARD, a citizen of the United States",residing at Norwich, in the county of New London and State ofConnecticut, have invented certain new and useful Improvements in Jointsfor Pipe- Couplings, of which the following is a full, clear, and exactdescription.

My invention is in so-called unions or couplings for the meeting ends ofpipes in which water or steam is maintained under pressure; and myobject is to provide a very simple and cheap ground joint that willreadily withstand extraordinary pressure.

Briefly described, my new device consists of a metallic washer of ringform having an annular extension that is adapted tolie within thecounterbored end of one member of the union, said annulus being locatedinside of the ground joint formed by thewasher proper and the abuttingportions of the two principal members of the union--that is to say, thetwo flanges into which the pipe ends are screwed.

My invention is equally applicable to flangeunions or ordinarycouplings; but I have illustrated it here as applied to a simple form offlange-union, Figure 1 being a side or edge view of such a union. Fig.2isa central longitudinal View of such a union and of my improvedwasher, the several elements being separated in order that the detailsof construction may be readily understood. In Figs. 3 and4= I have shownside and end views of my said washer detached.

In the drawings the letters a a indicate the two flanges of the union,each flange being threaded internally, as seen in Fig. 2, to receive themeeting ends of two pipe-sections. The confronting faces of said flangesare cupped, as at a a to receive a washer b, whose opposite sides areshaped to fit the said cupped portions of the flanges, the said washerbeing preferably made of brass, phosphor-bronze, or other metal that ispractically non corrosive when used with iron One end of the inner wallof the washer b is extended to provide an annular flange b, which whenthe several parts of the union are assembled lies in a correspondingflange is being screwed onto the pipe end recess a", that is formed bycounterboring the flange a, at the base of its cupped portion 0, It isnot intended or necessary that the annulus b shall fit tightly in therecess a, but rather that it shall be so fitted that the washer b may bereadily removed from the flange without the aid of tools, it beingdesirable that the washer be thus removed while the in order that thewasher may not be jammed or otherwise mutilated. The annulus b whenseated in the recess a serves to retain the washer in proper'relation tothe cupped portions 0. a of the flanges and to prevent the deflection ordisarrangement of the said washer'when the flanges are being clampedtogether, which is ordinarily accomplished by means of bolts 0 and nuts0', as seen in Fig.

1 of the drawings.

I desire to call particular attention to the important fact that theannulus b (by means of which the washer is retained in its operativeposition) is located entirely inside of the joint provided by the washerand the coacting cupped portion a and so that steam or water passinginto the recess a and surrounding the annulus cannot escape.

My described invention provides an exceedingly simple and effectivejoint, and it may be readily and. cheaply applied to unions andcouplings as now commonly constructed.

Having thus described my invention, I claim- In combination, with onemember of a pipecoupling having a cupped face a a companion memberhaving its face cupped as at a and formed with an annular recess a asset forth, and a washer interposed between said members and formed withan annular flange adapted to engage the said recess a the said flangeand coacting recess being located within the joint formed by theabutting faces of the washer with the cupped portions'of the saidmembers.

Signed at Norwich, Connecticut, this 27th day of February, 1902.

GEORGE F. BARD.

Witnesses:

CHAS. TYLER BARD, FRANK I-I. ALLEN.

